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  • Remote Debian System Preventing Logon

    - by choobablue
    I have a dozen or so single board computers on a network running Debian (squeeze) and access them via ssh (ssh server is dropbear). To give an idea of the hardware of these computers they're 1.2 GHz x86 processors, 1GB of RAM and 4GB flash drives formatted as ext2 (I avoided ext3 to prevent the added flash write stress from journaling), there is also a swap partition on the drive. Normally the setup I'm using works great and I can access all the computers. Every once in a while one will prevent access. What happens is I try to connect via ssh (putty) and it gives me the login prompt, I enter the username and password and it responds 'Access Denied' and it will also refuse any public key in ~/.ssh/authorized_keys. The credentials are correct as they worked previously. The computer responds to pings and putty recognizes the server public key, which implies to me the system is still running. Restarting the server fixes the problem and I can log in again. (I tried a temporary fix of putting shutdown -r now in the root crontab but this doesn't seem to reliably be run once the hang happens) Once I restart however there doesn't seem to be any information in any of the system logs to indicate what happened, the logs are simply empty for that time period, as if the system had crashed. There is some custom software running on the system which appears to stop working (which is why I wanted to ssh to begin with). I'm assuming that this program is the source of the problems but I'm unsure of how it would cause it and how to debug what is happening. The most likely explanation I can think of is that there is a memory leak in the other program that then prevents dropbear from spawning a new login shell (and crontab from executing shutdown) as there is not enough free memory. But looking at memory usage of the other (working) computers there doesn't seem to be any meaningful increase in memory to indicate a leak (unless it's a very big, fast acting and rare leak). I would think that when the OS ran out of memory it would restart the system or kill processes (the Linux kernel restarts right?). The other thing I wonder about is if the fact that they are running off a flash drive could have some effect, especially the swap partition (which I think I should remove to prevent wear of the flash), but the flash drives are young (~1 month) and I don't think that wear would be a factor yet. Does anybody have an idea of what could cause these symptoms, if it could be done by a memory leak, or something else I haven't thought of. And does anybody know of a method to try to debug the problem and find out more information about what's going wrong?

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  • Windows 7 re-installation

    - by GTX OC
    I need to reinstall Windows 7 but the problem is that all my partitions are set to Dynamic disk type.Windows cannot install on Dynamic disc type partitions.During the installation process there is an option to format the drive but I cannot change the disc type.Is there any way to convert the partitions back into primary so that I can re-install Windows?I am a complete fool.I don't even know why I converted the partition in which Windows was installed into dynamic type. I have a 1TB HDD having 4 partitions and all of them are dynamic. Thanks in advance.

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  • How to have 3 operating systems on a mirror RAID 1.

    - by Chris_45
    How do one proceed if I want to have 3 Operating Systems: Windows 7, Ubuntu, Debian plus a swap partion, all in all 4 partitions? Lets say I have 2 disks, each 640 GB and make room - 300 GB for Windows 7, 160 GB Ubuntu, 160 GB Debian and the rest for swap 20 GB. Where do I make these partitions, do I first make one big raid array 1 in BIOS and then partition when Windows 7 is installed or do I already in BIOS make these 4 partitions?

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  • How to delete old-school program from windows7?

    - by scythargon
    I just installed Ext2 Installable File System 1.11a, it creates new drive in "My computer" like link to my ext3 partition but further it does not work for me - an error appears when I try to access this drive (this program actually not for Windows 7) and now I want to remove it, but there is no appropriate menu entry in "Remove programms" window. And no folder in "Program files" So, how to remove it?

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  • want to restore windows 7 from linux ubuntu

    - by elisi
    Hi, I want to recovery Win7 from Linux and I dont have the Win7 CD or any previous back up files. Please tell me if there is a way to recovery Win7 from Linux because I do not want to boot it from the beginning cause I have important files and they are in one partition.

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  • encrypt multiple systems (win7 + deb)

    - by daftu
    I've installed two operatings system on single drive with 3 partitions (#1 Windows 7, #2 Debian Squeeze, #some data). Grub 2 is installed in MBR and lets me choose which system to boot. I would encrypt the 1st system partition containing Win 7. I tried to do this using TrueCrypt under Windows, but it says that encrypting Windows system with other loader (not windows loader, Grub in my case) is not supported. How can I do that?

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  • How do I automatically empty the trash on logout?

    - by Jonas
    Users on a linux (CentOS4) machine I administer consistently forget to empty the trash. Since the people work on big files, this can fill up the /home partition very quickly. Therefore, I would like to create a script that automatically empties the user's trash whenever they log out. How would I do that?

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  • How to manually check Ubuntu version? (e.g. from hard drive)

    - by tkoomzaaskz
    There is a fast way to check ubuntu version of the system: $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 11.10 Release: 11.10 Codename: oneiric But what are the files that store this information and how can I access them? Particularly, I've got an old partition with a dead Linux lying there and I would like to check what was its Ubuntu version. lsb_release -a shows my current Linux version only...

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  • SSD installed but system reserved drive is visible, how to fix?

    - by JL
    I've just installed an SSD as primary boot drive. During install, a system reserved partition was allocated (not very big) around 100MB. Problem is the drive is visible in explorer and its assigned to D: Anyone else had this problem, and is there a way to somehow hide that drive from explorer, and also get back the drive letter assignment? Thanks

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  • Binary diff/patch for large files on linux?

    - by thejh
    I've got two partition images (A and B) and want to use them to create a patch that I can apply on A on another computer in order to get the new B image without flooding the network. I have the following requirements: works on linux can create diffs can use diffs to patch files can handle binary files can handle large files (a few hundred GB should work) no user interaction required (just a console application) ideally, should be able to read from/write to pipes (so that I can pipe into it from a gzip-compressed file and write to one) Does something like that exist?

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  • Dual boot, win7 & ubuntu. Gparted, resize not move. Performance?

    - by data_jepp
    I installed dual boot on a computer that already had win7 installed. The question here is about gparted ability to move partitions. I made place for ubuntu in the computers "Data" partition, by resizing it. But I canceled the "move" action. Was that incredibly stupid, or is this care? Maybe performance is affected. Can this effect the hd's lifespan? The computer is UL30A.

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  • Running resize2fs on /

    - by user42363
    I'm trying to resize an ext4 filesystem on a Fedora 11 box. Using fsdisk and lvm, I was able to grow the partition and logical volume containing the filesystem. When I try to run resize2fs on the device containing the filesystem (/dev/sda2 in this case), I get: "Device or resource busy while trying to open /dev/sda2, Couldn't find valid filesystem superblock" I've tried this from a rescue disk that doesn't have the filesystem mounted, no joy. Maybe resize2fs doesn't know about ext4?

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  • App.Config Transformation for Visual Studio 2010?

    - by Amitabh
    For Visual Studio 2010 Web based application we have Config Transformation features by which we can maintain multiple configuration files for different environments. But the same feature is not available for App.Config files for Windows Services/WinForms or Console Application. There is a workaround available as suggested on the following link. http://vishaljoshi.blogspot.com/2010/05/applying-xdt-magic-to-appconfig.html However it is not straightforward and requires no of steps. Is there an easier way to achieve the same for App.Config files?

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  • Capture SOAP Envelope (C# WinForm calling .ASMX external vendor service)

    - by NealWalters
    I'm calling a third-party vendor's external SSL web service from a .NET 3.5 client (WinForm). The vendor has asked me to send them the Soap Header to verify why things aren't working. I used WireShark to capture packets, but since the web service is SSL, the packets are encrypted. Is there a few magic lines of code to add to my C# client to save or display the Soap Envelope either right before I call their web/method or right after?

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  • SVN X remains in tree-conflict

    - by Paul Knopf
    I am using VisualSVN (which uses Tortoise). I accidentally move a folder to a different location. When tries to move it back, SVN pukes with this error. It happened once before and I managed to do some random updates/commits, not knowing what I was doing and it was "fixed". I cannot pull the same magic again, so I need to know how to get my files and directory and of tree-conflict. Thanks!

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  • Loading PNG textures to OpenGL

    - by Tamir
    Hello, I'm working on a game, and all of my graphics use magenta as transparent/magic color. They are all 32-bit and the magenta is just for conveniency. Anyway, I would appreciate if someone could advice me what library should I use to load my images (I need to load them in GL_RGBA format, both internal and texture specific).

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  • C#: File-size format provider

    - by Seb Nilsson
    Is there any easy way to create a class that uses IFormatProvider that writes out a user-friendly file-size? public static string GetFileSizeString(string filePath) { FileInfo info = new FileInfo(@"c:\windows\notepad.exe"); long size = info.Length; string sizeString = size.ToString(FileSizeFormatProvider); // This is where the class does its magic... } It should result in strings formatted something like "2,5 MB", "3,9 GB", "670 bytes" and so on.

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  • Rails has_many with dinamyc :conditions

    - by Fabiano PS
    Hello! What I want is to create a Model that connects with other by a has_many in a dinamic way, without the foreing_key like this: has_many :faixas_aliquotas, :class_name => 'Fiscal::FaixaAliquota', :conditions => ["regra_fiscal = ?", ( lambda { return self.regra_fiscal } ) ] But I get the error: : SELECT * FROM "fis_faixa_aliquota" WHERE ("fis_faixa_aliquota".situacao_fiscal_id = 1 AND (regra_fiscal = E'--- !ruby/object:Proc {}')) Is my will makeable? I don't wanna black magic solution..

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  • Stretch array (Numpy, Python)

    - by Snej
    I have a numpy array [1,2,3,4,5,6,7,8,9,10,11,12,13,14] and want to have an array structured like [[1,2,3,4], [2,3,4,5], [3,4,5,6], ..., [11,12,13,14]]. Sure this is possible by looping over the large array and adding arrays of length four to the new array, but I'm curious if there is some secret 'magic' Python method doing just this :)

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  • Python: Dennis Nedry - Security

    - by Peter Nielsen
    Has anyone seen Jurrassic Park where Dennis Nedry has protected the system with an animation that says 'You didn't say the magic word' where after the system goes down. Is it possible to do something similar ikn Python ? To describe it less humoristic: A response screen which waits for a condition fulfilled by the user. And encrypts and locks the system after a certain time. Is that possible on a linux system by the use of Python ?

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